Doesn't happen now, because the sole craft was eventually retired. (Rather spitefully, too, with BA refusing to cede any to Virgin)
There is, nonetheless, Skylon under development, though dreadfully underfunded. If it actually works as expected, SABRE will be a quite remarkable innovation. So far, it's all looking good, including the particularly gnarly issue of cooling the incoming air in extremely little time.
There is, nonetheless, Skylon under development, though dreadfully underfunded. If it actually works as expected, SABRE will be a quite remarkable innovation. So far, it's all looking good, including the particularly gnarly issue of cooling the incoming air in extremely little time.
http://en.wikipedia.org/wiki/SABRE_(rocket_engine)